The On-Line Encyclopedia of Bongard Problems

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Straight lines that join filled and outlined circles intersect vs. straight lines that join filled and outlined circles do not intersect.

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	CROSSREFS	`Adjacent-numbered pages: BP256 BP257 BP258 BP259 BP260 * BP262 BP263 BP264 BP265 BP266`
	KEYWORD	`noisy, traditional`
	CONCEPT	`lines_coincide (info \| search),` `x-crossing (info \| search),` `outlined_filled (info \| search),` `feature_cluster (info \| search),` `cluster (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `texture (info \| search)`
	AUTHOR	`Michael Ihde`

BP260

Squares are either all empty or all contain something vs. not so.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP255 BP256 BP257 BP258 BP259 * BP261 BP262 BP263 BP264 BP265`
	KEYWORD	`traditional`
	CONCEPT	`all (info \| search),` `or (info \| search),` `empty (info \| search)`
	AUTHOR	`Carla Rispoli`

BP259

Two identical overlapping objects of which the top is rotated slightly clockwise vs. not so.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP254 BP255 BP256 BP257 BP258 * BP260 BP261 BP262 BP263 BP264`
	KEYWORD	`traditional`
	CONCEPT	`turn_orientation (info \| search),` `rotation_required (info \| search),` `objects_overlap (info \| search),` `overlap (info \| search),` `same_shape (info \| search),` `same (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

BP258

Objects identical after mirroring horizontally vs. objects identical after mirroring vertically.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP253 BP254 BP255 BP256 BP257 * BP259 BP260 BP261 BP262 BP263`
	KEYWORD	`traditional`
	AUTHOR	`Andreas Gunnarsson`

BP257

The distance from the center of the line to the bottom of the square is the same as the distance from the dot to the right edge of the square vs. not so.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP252 BP253 BP254 BP255 BP256 * BP258 BP259 BP260 BP261 BP262`
	KEYWORD	`convoluted, notso, boundingbox, traditional, absoluteposition`
	CONCEPT	`bounding_box (info \| search),` `length_line_or_curve (info \| search),` `midpoint (info \| search),` `imagined_point (info \| search),` `imagined_line_or_curve (info \| search),` `imagined_entity (info \| search),` `same_feature (info \| search),` `same (info \| search),` `distance_from_center (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

BP256

Each large circle closer to a small circle than a large one, and each small circle closer to a large one than a small one vs. not so.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP251 BP252 BP253 BP254 BP255 * BP257 BP258 BP259 BP260 BP261`
	KEYWORD	`traditional`
	CONCEPT	`length_line_or_curve (info \| search),` `near_far (info \| search),` `size (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

BP255

Three pairs of parallel and non-collinear pieces of straight lines, each pair with a different slope vs. not so.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP250 BP251 BP252 BP253 BP254 * BP256 BP257 BP258 BP259 BP260`
	KEYWORD	`traditional`
	CONCEPT	`feature_cluster (info \| search),` `cluster (info \| search),` `three (info \| search),` `parallel (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

BP254

Circle and two vertices are collinear vs. no two vertices and the circle are collinear.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP249 BP250 BP251 BP252 BP253 * BP255 BP256 BP257 BP258 BP259`
	KEYWORD	`traditional`
	CONCEPT	`collinear (info \| search),` `vertex_of_meeting_lines (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

BP253

Prime number vs. composite number.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP248 BP249 BP250 BP251 BP252 * BP254 BP255 BP256 BP257 BP258`
	KEYWORD	`noisy, traditional`
	CONCEPT	`prime (info \| search),` `cluster (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

BP252

Impossible solid in 3-D vs. possible solid in 3-D.

(edit; present; nest [left/right]; search; history)

	CROSSREFS	`Adjacent-numbered pages: BP247 BP248 BP249 BP250 BP251 * BP253 BP254 BP255 BP256 BP257`
	KEYWORD	`anticomputer, traditional`
	CONCEPT	`impossible (info \| search),` `3d_impossible_solid (info \| search)`
	AUTHOR	`Andreas Gunnarsson`

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